I'm so surprised no one is talking about how amazingly cool this is! With SmartGlass we can send messages over Chats, Skype and in forum postings (such as this very post). I even make entries on web pages, such as filling out Forms using it! It's so simple, for example: While sending a message, I just jump to SmartGlass, tap the microphone on my phone's keyboard and talk.
When I'm done, the entry is pushed to the Xbox One... forget typing with the onscreen keyboard or even with your phone or tablet's keyboards, just use your voice with the native voice recognition most tablets and Smart phones have these days.
I personally use Swype's Dragon voice recognition, but it all works with this just the same.